package cn.zyl.common.redis.base;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * Test类说明:
 *
 * @author wsz
 * @version v1.0
 * @date 2020-07-31
 */
public class Test {
    /**
     * 从网络Url中下载文件
     * @param urlStr 下载路径
     * @param fileName 文件名称
     * @param savePath 文件保存目录
     * @throws IOException 异常
     */
    public static void  downLoadFromUrl(String urlStr,String fileName,String savePath) throws IOException {
        URL url = new URL(urlStr);
        HttpURLConnection conn = (HttpURLConnection)url.openConnection();
        //设置超时间为3秒
        conn.setConnectTimeout(3*1000);
        //防止屏蔽程序抓取而返回403错误
        conn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 5.0; Windows NT; DigExt)");
        //得到输入流
        InputStream inputStream = conn.getInputStream();
        //获取自己数组
        byte[] getData = readInputStream(inputStream);
        //文件保存位置
        File saveDir = new File(savePath);
        if(!saveDir.exists()){
            saveDir.mkdir();
        }
        File file = new File(saveDir+ File.separator+fileName);
        FileOutputStream fos = new FileOutputStream(file);
        fos.write(getData);
        if(fos!=null){
            fos.close();
        }
        if(inputStream!=null){
            inputStream.close();
        }
        System.out.println("info:"+url+" download success");
    }
    /**
     * 从输入流中获取字节数组
     * @param inputStream 流
     * @return 字节
     * @throws IOException 异常
     */
    public static byte[] readInputStream(InputStream inputStream) throws IOException {
        byte[] buffer = new byte[1024];
        int len = 0;
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        while((len = inputStream.read(buffer)) != -1) {
            bos.write(buffer, 0, len);
        }
        bos.close();
        return bos.toByteArray();
    }
    public static void downLoad(){
        try{
            Map<String,String> map= new HashMap<>(350);
            map.put("3D Diagonal.flf", "http://patorjk.com/software/taag/fonts/3D%20Diagonal.flf");
            map.forEach((k,v) ->{
                try {
                    System.out.println(k+" download start.");
                    downLoadFromUrl(v, k, "d:/test");
                } catch (IOException e) {
                    e.printStackTrace();
                }
            });
        }catch (Exception e) {
            e.printStackTrace();
        }
    }
    public static void main(String[] args) {
        String del = "del";
        System.out.println(del);
        System.out.println(Arrays.toString(del.getBytes()));
    }
}
